| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Maple | Mugwort | Chestnut | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Amaranth | Oak | Sorrel | Willow | Nettle | Other | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 755 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 34 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 200 (Very high) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 | 2 |
| February | 357 (Very high) | 0 (Low) | 12 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 107 (Very high) | 0 (Low) | 52 (High) | 4 (Low) | 4 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 | 2 |
| March | 207 (Very high) | 439 (Very high) | 15 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 22 (Medium) | 14 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 37 (Medium) | 8 (Low) | 36 (Medium) | 16 (Medium) | 106 (Very high) | 1 (Low) | 3 (Low) | 1 (Low) | 7 (Low) | 10 (Low) | 3 | 4 |
| April | 21 (Low) | 420 (Very high) | 11 (Low) | 13 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 14 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 7 (Low) | 13 (Low) | 2 (Low) | 20 (Medium) | 43 (Medium) | 0 (Low) | 197 (Very high) | 5 (Low) | 30 (Medium) | 12 (Low) | 5 | 10 |
| May | 16 (Low) | 34 (Medium) | 185 (Very high) | 39 (Medium) | 86 (Medium) | 10 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 6 (Low) | 1 (Low) | 26 (Medium) | 1 (Low) | 1 (Low) | 16 (Medium) | 0 (Low) | 215 (Very high) | 0 (Low) | 9 (Low) | 2,633 (Very high) | 62 (High) | 3 (Low) | 33 (Medium) | 11 | 25 |
| June | 7 (Low) | 3 (Low) | 83 (Medium) | 13 (Low) | 89 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 33 (Medium) | 3 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 122 (Very high) | 0 (Low) | 5 (Low) | 339 (Very high) | 20 (Medium) | 4 (Low) | 14 (Low) | 8 | 17 |
| July | 2 (Low) | 1 (Low) | 45 (Medium) | 4 (Low) | 5 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 36 (Medium) | 3 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 5 (Low) | 29 (Medium) | 7 (Low) | 1 (Low) | 9 (Low) | 6 | 20 |
| August | 2 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 4 (Low) | 26 (Medium) | 1 (Low) | 0 (Low) | 3 (Low) | 3 | 9 |
| September | 1 (Low) | 1 (Low) | 5 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 15 (Medium) | 22 (Medium) | 2 (Low) | 0 (Low) | 2 (Low) | 3 | 9 |
| October | 7 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 4 |
| November | 17 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 | 3 |
| December | 74 (Medium) | 1 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 | 3 |